[Webkit-unassigned] [Bug 177227] New: [GTK][WPE] Allow rendering images bigger than the cairo limitation of 32768 pixels

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177227

            Bug ID: 177227
           Summary: [GTK][WPE] Allow rendering images bigger than the
                    cairo limitation of 32768 pixels
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: magomez at igalia.com
                CC: bugs-noreply at webkitgtk.org

Due the 16.16 format used by pixman to store floats, it can only render images with a maximum size of 32768 pixels (width or height). In bug #168964 we disabled the decoding of images larger than that cause that would break the rendering of the rest of the page, but we need to implement a way to render those images. We could replace NativeImagePtr with a tiled version of the image, with a new class or maybe reusing the TiledBackingStore.

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